@import "compass/css3";

$inner-circles-loader-size: 50px !default;
$inner-circles-loader-color-1: #19a598 !default;
$inner-circles-loader-color-2: #c7efcf !default;
$inner-circles-loader-color-3: #eef5db !default;
$inner-circles-loader-speed: 3s !default;

/* :not(:required) hides this rule from IE9 and below */
.inner-circles-loader:not(:required) {
  @include transform(translate3d(0, 0, 0));
  position: relative;
  display: inline-block;
  width: $inner-circles-loader-size;
  height: $inner-circles-loader-size;
  background: rgba($inner-circles-loader-color-1, .5);
  border-radius: 50%;
  overflow: hidden;
  text-indent: -9999px;

  /* Hides inner circles outside base circle at safari */
  -webkit-mask-image: url();

  &:before, &:after {
    content: '';
    position: absolute;
    top: 0;
    display: inline-block;
    width: $inner-circles-loader-size;
    height: $inner-circles-loader-size;
    border-radius: 50%;
  }

  &:before {
    @include animation(inner-circles-loader $inner-circles-loader-speed infinite);
    @include transform-origin(0, 50%);
    left: 0;
    background: $inner-circles-loader-color-2;
  }

  &:after {
    @include animation(inner-circles-loader $inner-circles-loader-speed .2s reverse infinite);
    @include transform-origin(100%, 50%);
    right: 0;
    background: $inner-circles-loader-color-3;
  }
}

@include keyframes(inner-circles-loader) {
  0%   { @include transform(rotate(0deg)) }
  50%  { @include transform(rotate(360deg)) }
  100% { @include transform(rotate(0deg)) }
}
